#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Mon Dec  7 22:25:32 2020

@author: edger330
"""

li = [1,3,4,3,3,5,2,4,2,5,2]
set1=set(li)
for i in set1:
    li.remove(i)
set2 = set(li)
set3 = set1 - set2
for j in set3:
    print(j)